Struct rxing::RGBLuminanceSource

pub struct RGBLuminanceSource { /* private fields */ }

This class is used to help decode images from files which arrive as RGB data from an ARGB pixel array. It does not support rotation.

@author dswitkin@google.com (Daniel Switkin) @author Betaminos

Implementations

impl RGBLuminanceSource

pub fn new_with_width_height_pixels(
    width: usize,
    height: usize,
    pixels: &[u32]
) -> Self

Trait Implementations

impl Clone for RGBLuminanceSource

fn clone(&self) -> RGBLuminanceSource

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RGBLuminanceSource

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl LuminanceSource for RGBLuminanceSource

fn getRow(&self, y: usize) -> Vec<u8>

Fetches one row of luminance data from the underlying platform’s bitmap. Values range from 0 (black) to 255 (white). Because Java does not have an unsigned byte type, callers will have to bitwise and with 0xff for each value. It is preferable for implementations of this method to only fetch this row rather than the whole image, since no 2D Readers may be installed and getMatrix() may never be called.

fn getMatrix(&self) -> Vec<u8>

Fetches luminance data for the underlying bitmap. Values should be fetched using: {@code int luminance = array[y * width + x] & 0xff}

fn getWidth(&self) -> usize

@return The width of the bitmap.

fn getHeight(&self) -> usize

@return The height of the bitmap.

fn isCropSupported(&self) -> bool

@return Whether this subclass supports cropping.

fn crop(
    &self,
    left: usize,
    top: usize,
    width: usize,
    height: usize
) -> Result<Box<dyn LuminanceSource>, Exceptions>

Returns a new object with cropped image data. Implementations may keep a reference to the original data rather than a copy. Only callable if isCropSupported() is true.

fn invert(&mut self)

@return a wrapper of this {@code LuminanceSource} which inverts the luminances it returns – black becomes white and vice versa, and each value becomes (255-value).

fn isRotateSupported(&self) -> bool

@return Whether this subclass supports counter-clockwise rotation.

fn rotateCounterClockwise(&self) -> Result<Box<dyn LuminanceSource>, Exceptions>

Returns a new object with rotated image data by 90 degrees counterclockwise. Only callable if {@link #isRotateSupported()} is true.

fn rotateCounterClockwise45(
    &self
) -> Result<Box<dyn LuminanceSource>, Exceptions>

Returns a new object with rotated image data by 45 degrees counterclockwise. Only callable if {@link #isRotateSupported()} is true.

fn invert_block_of_bytes(&self, vec_to_invert: Vec<u8>) -> Vec<u8>